Funny you should say that about fuel and hydration and being knackered. I feel the same way. I did a two hour mt bike ride on Sunday. One that I considered to be moderately paced, so good hills, a challenging place to ride, but not crazy.

I would have liked to have pushed harder on Monday's workout...but knackered seems to be it. I know that it is preholiday right now, and there is more running around and stress, BUT

I am starting to think that I may not be fueling correctly. I think I have my hydration down, but I am hungry all the time.

hmmmm.....